Incestuous linking is an SEO tactic used by a webmaster to promote an anthology of their own web sites, or those of close associates.

Due to the dominance of the search engine market in Google, and its original Page Rank technology, sites are considered to be more significant if they have great numbers of inbound links. If the coming inbound links are from highly ranked web sites, they will enhance the web site more. With the adopt of blogging as well as social networking sites such as MySpace, this has resulted in plenty of web sites that are inter-linked and can increase the ranking of a web site with no merit.

A blog (an synopsis of the term web log) is a website, typically maintained by an entity, with standard entries of comments, descriptions of actions, or new material such as graphics or video. Entries are normally displayed in reverse sequential order.